CyberRota Analysis
AI-GeneratedThe vulnerability affects the Apache Velocity.js template engine versions prior to 2.1.7, allowing attackers to exploit unfiltered property-read expressions to access sensitive server resources and execute arbitrary shell commands. This critical flaw poses significant risks, including unauthorized access to environment variables and cloud credentials, which could lead to further network exploitation. Organizations using affected versions should prioritize immediate updates to version 2.1.7 to mitigate these risks.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Velocity.js is a JavaScript implementation of the Apache Velocity template engine. Prior to 2.1.7, the earlier fix for CVE-2026-44966 filtered constructor, __proto__, and prototype only in the #set assignment handler in src/compile/set.ts, while property-read expressions in src/compile/references.ts remained unfiltered. The getReferences() flow called getAttributes(), whose property access allowed an attacker-controlled template to traverse constructor.constructor to the JavaScript Function constructor. The #set handler validated only the assignment target and did not inspect the right-hand property-read expression, allowing arbitrary shell commands, environment-variable access, cloud-credential access, and internal-network access in the server process. This issue is fixed in version 2.1.7.